will hit showrooms in california and oregon next summer. engineers are still testing the pure plug-in so general motors can't say yet how many miles the sub-compact will get on a single charge. what it can say is new technology will allow for faster charging. the spark won't be cheap. with tax incentives, the car's sticker price will be about $25,000, double the price of the gas-powered version. >> when you look at the functionality that this vehicle has and the range we offer-- which we believe is the top of its segment-- it is going to be extremely competitive from a price perspective. you're always going to pay more for an electric vehicle than you would for a traditional vehicle with a gas engine. >> reporter: general motors has placed a huge bet on electric vehicles, hoping they'll help the company reach the government's 50-mile per gallon corporate average fuel economy requirement in 2025. but so far, interest in e.v.s has been lukewarm. g.m. launched the electric hybrid volt nearly two years ago, but so far the company has sold only